Re: fakeroot

[Jeff Johnson <n3npq jbj gmail com>]

On Jul 29, 2006, at 3:43 PM, Frank Cusack wrote:

> On July 29, 2006 10:10:42 AM -0600 Bob Proulx <bob proulx com> wrote:
> > Red Hat's rpm contains a %attr(-,root,root) directive that overrides
> > the owners stored in the embedded cpio of the .rpm file.  Therefore
> > generally fakeroot is not needed with rpm.  Simply use %attr to set
> > the ownership as you require them to be set.  You will still see the
> > builder's ownership in the .rpm file (e.g. rpm2cpio) but at
> > installation time the ownership will be set by rpm explicitly.
>
> Minor point (don't let it distract from the main point of the thread),
> this is incorrect.  rpm alters the file data when STORING data into
> the embedded .cpio, not when EXTRACTING.  rpm2cpio | cpio -itv will
> reveal the %attr attributes, not the on-disk attributes at build time.

Hmmm, not per-se. None of the info in cpio headers is used by rpm  
(other than
the path name), so %attr() is set by rpm -Uvh when EXTRACTING.

However, I have a dim memory of generating the cpio headers from % 
attr rather
than from the staged file in $RPM_BUILD_ROOT like 4-5 years ago in  
order to
simplify QA to diff'in rpm -qlp against rpm2cpio ... | cpio -itv, and  
so that rpm2cpio
would result in a largely (cpio has its own special pains) identical  
install.

So %attr is used both STORING and EXTRACTING iirc.

And fakeroot (or any equivalent LD_PRELOAD scheme) can be used, but  
is largely unnecessary.

73 de Jeff